package com.huang.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.huang.eduservice.entity.EduSubject;
import com.huang.eduservice.entity.excel.SubjectData;
import com.huang.eduservice.service.EduSubjectService;
import com.huang.servicebase.execptionhandler.huangException;


public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {
    //因为SubjectExcelListener不能交给spring进行管理，需要自己new，不能注入其他对象
    //不能实现数据库操作
    public EduSubjectService subjectService;

    public SubjectExcelListener() {
    }

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        //一行一行读取excel中数据
        if (subjectData == null) {
            throw new huangException(20001, "读取数据为空");
        }
        EduSubject oneSub = this.existOneSub(subjectService, subjectData.getOneSubjectName());
        if (oneSub == null) {
            oneSub = new EduSubject();
            oneSub.setParentId("0");
            oneSub.setTitle(subjectData.getOneSubjectName());
            subjectService.save(oneSub);
        }
        String pid = oneSub.getId();
        EduSubject twoSub = this.existTwoSub(subjectService, subjectData.getTwoSubjectName(), pid);
        if (twoSub == null) {
            twoSub = new EduSubject();
            twoSub.setTitle(subjectData.getTwoSubjectName());
            twoSub.setParentId(pid);
            subjectService.save(twoSub);
        }

    }

    private EduSubject existOneSub(EduSubjectService subjectService, String name) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", "0");
        EduSubject oneSub = subjectService.getOne(wrapper);
        return oneSub;

    }

    private EduSubject existTwoSub(EduSubjectService subjectService, String name, String pid) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", pid);
        EduSubject twoSub = subjectService.getOne(wrapper);
        return twoSub;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
